Co-Validate: Get a Staff Engineer Review of Your Plan

Arguments

$ARGUMENTS should be the path to the plan file. If not provided, check if there is a plan file from the current session (for example in .claude/projects/ or the working directory).

Step 1: Read the Plan and Spawn a Background Subagent for Codex

1. Read the plan file at the path provided in $ARGUMENTS.
2. Find the original user prompt that triggered the plan by checking the conversation history.
3. Spawn a background subagent to handle the Codex review.

You MUST spawn a background subagent (using the Task tool with run_in_background: true) to handle all communication with Codex. The subagent should:

1. Call mcp__validate-plans-and-brainstorm-ideas__codex with:
   • prompt: construct exactly as shown below
   • sandbox: read-only
   • approval-policy: never
   • cwd: (use the current working directory)